Moparman88,

What you speak of it's known as death wobble or dw. It can sometimes be very difficult to pin down the cause. The first step you should take it's to get an alignment.

 

i havent got an alignment on and i havent done a xfer drop...not sure what a sye is...it doesnt do it all the time and it starts around 30mph. from what i can see going down the road the wheel is moving in a oblong cyrcle if that makes any sence

 

Text book dw. Sye is short for slip yoke eliminator. It installs on the rear of your tc so the pinion doesn't slip out. but you shouldn't need with only a three inch lift. And that wouldn't cause dw anyway. Neither would the need of a tc drop. That would just cause vibes as you drove, not make the steering wheel shake. The cause is more than likely in the steering components.

 

not sure what a dw is but i do know what a sye is just not as a sye...what i dont get is why it only does it some times...im sure its in the steering because i can turn the wheel and most of the time it will stop...just depends on how bad it gets...

 

Dw is short for death wobble which is the name for the problem you're having.

 

Your caster could be off. Like a shopping cart with a wobbly front wheel. only does it when you pick up speed.

 

yes i have heard of the dw that you speak of....is the caster something i can check on my own or should i just take it to a front end shop and see what they say...i like to do as much of the work i can and my father-in-law runs a auto repair shop so he has most of the tools i need but we have no way to mess with alignment stuff

 

Take it to a front end shop and get it aligned. The castor is part of the alignment. If your axel is to far back (or front, I can't remember) you will have too much negative castor which makes it difficult for the vehicle to hold a straight line. The only way to correct the castor it's to place shims behind the lca's (unless you have adjustable lcs's) then you can just lengthen our shorten them to work. Toe issues can also cause the same problem.

 

I had the same problem yesterday. Seeing as how I work at a tire shop I balanced my tires, rotated them and problem was fixed.

 

He is at like 5"-6" though with the lift and bb, unless I'm reading original post wrong...so it could be a number of things making it wobble...I have the exact same setup as him, had alignment done, all steering components were good...but still wobbled at around 45ish...did a xfer drop and good...who know I coulda just had a lil bug...cause I was good at that height for a while without it...it started and did that and prob was solved...?

Just trying to name off a few things I can think of...

But at about 6" u will a few more things to keep it a lil mote road reliable

 

Ok so I have enough money to either get a 2" lift first or 30" tires first. Which one should I get or should I wait til I have enough to get em both?

Im skeptical on how a lift would look if I kept stock tires

but also I don't know if 30" tires would fit on stock suspension

 

Get the lift first. Look at my pics. I'm running a 3"lift on stock tires.

 

Ok guys i have tried to search for the answer to this and I have done quite a bit of reading. It seems that some say one thing and others say another.

I have a lifted grand now and I have been wheelin for a good portion of my life. Also im a mechanic and have lifted a few rigs here and there. I will be getting a 99 XJ and want to go 4.5 with 31" tires for flex. My question is: Do you actually have to get a SYE? If so i would think it would be easier and a little more cost affective to have both front and read DL lengthened by a bit. If this is a viable option how much would one want to lengthened either by? Sorry it just seems like a simple answer to a simple problem to me. Is there something I am missing?

Thanks

 

You won't know if you need a sye till you actually lift it. Pre 97's are more prone to vibes than post 97's. I didn't have any vibes with my 99 so I didn't do a sye or t-case drop, but ever jeep is different. If you buy a sye you will either need to use the front shaft out of another xj or grand or have a custom shaft made. I don't really know of any way to "lengthen" a stock drive shaft but someone may know something I don't.

 

Thank you for the reply. There is a Custom DL shop that we deal with and pretty much the cut it add some more tubing, weld it up, rebalance it and your good to go. (this is the process as far as i know)

Is the SYE only for Vibes? Or does any one have any problems with the DL actually coming out? I have seen this on the trail just cant remember what make or model it was.